C34.91

HCC Category Mapping

What This Code Means

This code represents cancer that has developed in the right lung or bronchus (the airway leading to the lung), but the specific location within the lung has not been documented or identified. This is used when a patient has been diagnosed with lung cancer on the right side, but more detailed information about the exact tumor location is not available.

Coding Tips

• •Use this code only when the documentation does not specify a more precise anatomical location (such as upper lobe, lower lobe, or main bronchus); query the provider if additional specificity is available in pathology reports or imaging studies
• •Ensure you have confirmed laterality is right-sided; if the lung is unspecified or bilateral, different codes apply; always verify histological type separately as this code does not include morphology

Clinical Significance

Right-sided lung cancer without specified lobe provides laterality but lacks anatomical detail within the lung. The right lung contains three lobes (upper, middle, lower), and identifying the specific lobe is critical for surgical planning. This code captures laterality but should trigger a query for lobar specificity.

Documentation Requirements

• ✓Clinical or pathological confirmation of right-sided lung malignancy
• ✓Evidence of provider query for lobar specificity
• ✓Imaging reports reviewed for anatomical location
• ✓Histological type and molecular markers
• ✓TNM staging and treatment plan

Commonly Confused Codes